CN110827703A

CN110827703A - Hand-drawn LED lamp board input display method based on similarity correction algorithm

Info

Publication number: CN110827703A
Application number: CN201911037903.6A
Authority: CN
Inventors: 胡方红; 李竹; 周巧娣
Original assignee: Hangzhou Electronic Science and Technology University
Current assignee: Hangzhou Electronic Science and Technology University
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-02-21
Anticipated expiration: 2039-10-29
Also published as: CN110827703B

Abstract

The invention discloses an input display method of a hand-drawn LED lamp board based on a similar correction algorithm. The traditional LED lamp board is designed in advance through advertising companies, patterns, characters, fonts and pattern colors are fixed, and once a design scheme is determined, the patterns cannot be modified. The invention relates to an input display method of a hand-drawn LED lamp board based on a similar correction algorithm. The LED array is arranged on the substrate and comprises a plurality of LED tuples which are arranged in an array shape. The LED tuples comprise LED red lamps, LED green lamps, LED blue lamps and pressure sensors. The LED red light, the LED green light and the LED blue light are all arranged on the detection surface of the pressure sensor. The invention can realize the color switching and definition of the LED lamp board according to the color set by the user. The invention realizes that the user manually draws the patterns and characters of the LED lamp board by utilizing the pressure sensor and combining the data processing technology.

Description

Hand-drawn LED lamp board input display method based on similarity correction algorithm

Technical Field

The invention belongs to the technical field of intelligent display, and particularly relates to an input display method of a hand-drawn LED lamp board based on a similar correction algorithm.

Background

In many application occasions, along with the popularization of LED display screens (advertising boards), the development direction of future LED lamp boards is intelligentized, efficient, erasable and easy to modify. The traditional LED lamp board is designed in advance through advertising companies, patterns, characters, fonts and pattern colors are fixed, once a design scheme is determined, the patterns cannot be modified, and the traditional LED lamp board is difficult to secondarily utilize resources seriously, such as a fan lamp board for a concert, a movable lamp board and the like. Therefore, on the basis of the existing LED lamp board technology, the design method of the intelligent LED lamp board capable of being manually drawn, erased and changed in color is realized by combining the touch sensor with the wireless communication technology, and the application value of using the intelligent LED lamp board can be greatly improved.

Disclosure of Invention

The invention aims to provide an input display method of a hand-drawn LED lamp board based on a similar correction algorithm.

The invention relates to an input display method of a hand-drawn LED lamp board based on a similar correction algorithm. The LED array is arranged on the substrate and comprises a plurality of LED tuples which are arranged in an array shape. The LED tuples comprise LED red lamps, LED green lamps, LED blue lamps and pressure sensors. The LED red light, the LED green light and the LED blue light are all arranged on the detection surface of the pressure sensor.

The input display method of the hand-drawn LED lamp board based on the similar correction algorithm specifically comprises the following steps:

step one, starting the hand-painted LED lamp board.

And secondly, drawing a graph to be displayed on the LED array by a user through a finger or a touch pen, wherein when the finger or the touch pen passes through the LED tuples, the pressure sensor in the LED tuples detects a pressure signal, and the LED tuples are lightened, so that the graph drawn by the user is displayed on the LED array.

And step three, after the drawing is finished, if the image on the LED array needs to be corrected, the step four is carried out. Otherwise, the drawing display is ended.

And step four, generating a corrected image. The number of pixel points, the number of rows and the number of columns of the corrected image are all equal to those of the LED array. Each characteristic pixel point on the corrected image is black, and the rest pixel points are white; the characteristic pixel points are pixel points corresponding to each lighted LED tuple on the LED array.

And step five, thinning the corrected image.

5-1, traversing each black pixel point in the corrected image; if there are four or more than four black pixel points in the eight neighborhoods of one pixel point, the pixel point is set to be white. And after one pixel point is set to be white, extracting eight neighborhoods of the next pixel point according to the corrected image after modification.

And 5-2, continuously and repeatedly executing the step 5-1 until any pixel point is not set to be white after the step 5-2 is executed once, and entering the step six.

And step six, performing deburring treatment on the corrected image processed in the step five.

6-1, traversing all black pixel points in the corrected image, and screening out forked pixel points; the branched pixel points are black pixel points with the number of black pixel points in eight neighborhoods larger than 3.

6-2, setting all the branched pixel points in the corrected image to be white; thus, the originally connected regions become a plurality of small regions that are not connected.

And 6-3, respectively calculating the number of black pixel points of each connected domain in the corrected image, and setting the connected domains with the number of the black pixel points smaller than a threshold value T as white.

6-4, resetting the forked pixel points deleted in the step 6-2 to be black.

6-5, repeating the steps 6-1 to 6-4 until no pixel point is deleted in the step 6-3, and entering the step seven.

And step seven, performing expansion method operation on the corrected image.

7-1, setting structural elements.

7-2, performing expansion detection on all pixel points except edge pixel points on the corrected image by using the structural elements; edge pixels refer to pixels on the edge of the rectified image.

When a pixel point is subjected to expansion detection by using a structural element, firstly, the key point of the structural element is superposed with the detected pixel point; if the pixels covered by the black pixels of the structural elements on the corrected image have the original black pixels, the detected pixels are marked as pixels to be expanded.

7-3, setting all the pixel points to be expanded detected in the step 7-2 to be black; at this time, the corrected image is corrected.

Step eight, extinguishing each LED tuple in the LED array; and then, one-to-one corresponding black pixel points on the corrected image to the LED array, and enabling LED tuples corresponding to the black pixel points on the corrected image on the LED array to be lightened.

Preferably, the structural element in the seventh step is composed of nine pixel points arranged in a 3 × 3 manner. The key point of the structural element is the center point.

Preferably, the hand-drawn LED lamp board further comprises an on/off key, a writing/locking key, a clearing/recovering key, a color switching key, a similar correction on/off key and a color lamp group. The on/off key, the write-in/locking key, the clear/recovery key, the color switching key, the similar correction on/off key and the indicating lamp set are arranged on the substrate. The indicating lamp group consists of a power supply indicating lamp and seven color indicating lamp beads. The colors of the seven color indicating lamp beads are blue, green, cyan, red, purple, yellow and white respectively.

Preferably, the hand-painted LED lamp board further comprises a wireless communication module and a controller. The controller is connected with the upper computer through the wireless communication module. The control interfaces of the LED red light, the LED green light and the LED blue light and the signal output interface of the pressure sensor are all connected with the controller. The on/off key, the write-in/locking key, the clear/recovery key, the color switching key, the similar correction on/off key and the indicating lamp set are sequentially arranged on one side of the substrate and are connected with the controller.

Preferably, in one LED tuple, the LED red light, the LED green light and the LED blue light are arranged in a regular triangle.

The invention has the beneficial effects that:

1. the invention can realize the color switching and definition of the LED lamp board according to the color set by the user.

2. The invention realizes that the user manually draws the patterns and characters of the LED lamp board by utilizing the pressure sensor and combining the data processing technology.

3. The intelligent LED lamp board designed by the invention can effectively reduce the waste of materials and labor caused by one-time customization of the LED lamp board, and greatly reduce the single use cost of the LED lamp board.

4. The invention utilizes the mobile phone app to draw patterns by hand and can synchronously display the patterns to the LED lamp board in a wireless mode.

5. The invention can realize that the LED displays the pattern and the character corrected by the algorithm through the similar correction algorithm.

Drawings

FIG. 1 is a schematic view of a hand-drawn LED light board according to the present invention;

fig. 2 is a schematic structural diagram of an LED tuple in the hand-drawn LED light board adopted in the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the hand-drawn LED lamp board input display method based on the similar correction algorithm includes a substrate 1, an LED array 2, an on/off key 3, a write/lock key 4, a clear/restore key 5, a color switch key 6, a similar correction on/off key 7, an indicator light group 8, a wireless communication module, and a controller. The controller is connected with the upper computer through the wireless communication module.

The LED array 2 is disposed on the substrate and includes a plurality of LED tuples arranged in an array. The LED tuples comprise an LED red light 2-1, an LED green light 2-2, an LED blue light 2-3 and a pressure sensor 2-4. The LED red lamps 2-1, the LED green lamps 2-2 and the LED blue lamps 2-3 are arranged in a regular triangle and are all arranged on the detection surface of the pressure sensor 2-4; when the LED red light, the LED green light and the LED blue light are pressed, the pressure sensor detects the pressure. The external square area of the pressure sensor is a single touch sensor sensing area, and the coordinates of the touch sensor sensing area correspond to the corresponding LED tuples one by one. The control interfaces of the LED red light, the LED green light and the LED blue light and the signal output interface of the pressure sensor are all connected with the controller.

One or more of the LED red lamps, the LED green lamps and the LED blue lamps are lighted, so that the LED tuples can present seven colors of blue, green, cyan, red, purple, yellow and white; the light emitting control mode is realized by controlling the assignment of the main switch state, the red light switch state, the green light switch state and the blue light switch state; on the premise that the master switch state is assigned to 1, if the red light switch state is assigned to 1, the LED red light is energized, if the green light switch state is assigned to 1, the LED green light is energized, and if the blue light switch state is assigned to 1, the LED blue light is energized. Control of the specific colors presented is shown in the following table:

master switch state	Red light on-off state	Green light on-off state	Blue light on-off state	Rendering color
						1	0	0	0	Does not emit light
1	0	0	1	Blue (B)
					1	0	1	0	Green
1	0	1	1	Green leaf of Chinese cabbage
					1	1	0	0	Red wine
1	1	0	1	Purple pigment
					1	1	1	0	Yellow colour
1	1	1	1	White colour (Bai)
					0	-	-	-	Does not emit light

The on/off key 3, the write-in/lock key 4, the clear/restore key 5, the color switching key 6, the similar correction on/off key 7 and the indicator light group 8 are sequentially arranged on one side of the substrate and are all connected with the controller. The indicating lamp group consists of a power supply indicating lamp and seven color indicating lamp beads. The colors of the seven color indicating lamp beads are blue, green, cyan, red, purple, yellow and white respectively. The controller adopts a singlechip.

The on/off key is that a chip control module power main switch is turned on when an on key is pressed for the first time, the on/off state of all LED tuple switches is set to be 0 (off) by default when the on key is started, and a power indicator lamp is turned on. All the LED tuples that have been turned on are turned off again on/off (status set to 0), while the power indicator is turned off.

Write/lock button: when the write/lock key is pressed for the first time, the switch state of the touch sensor embedded in the surface of each LED tuple is set to be 1 (opened), and at the moment, a user can perform handwriting operation in the display area. The written content can be locked when the write/lock key is pressed again. Multiple locking, write cycles are possible.

Clear/resume button: when the clear button is turned on for the first time, the control chip sets the switch states of all turned-on LED tuples to 0 (namely, the off state). Pressing the clear/restore key again restores the previously turned on LED tuples.

Color switching key: the key is set to display blue, green, cyan, red, purple, yellow, white and off at one time by using the principle of a digital circuit adder, and the seven colors are added into a state cycle. User color selection needs to be carried out before drawing, and the current selected color condition can be checked through a color selection indicator lamp.

Similar correction on-off key: opening similar correction button and drawing the pattern or writing after the word and can pass through wireless transceiver module and upload to high in the clouds (server) and carry out analysis processes after the user, combine correction algorithm, realize the correction of pattern or word, will correct the result and return to LED lamp tablet processing module through wireless transceiver module after correcting, finally update the pattern or the word that show on the LED lamp tablet and realize correcting.

step one, a user presses down/key to start an LED lamp board, and a power indicator and a color indicator corresponding to the current state are lighted; thereafter, the user presses the write/lock button, which causes the controller to set the master switch state of all LED tuples to 1.

And secondly, drawing a graph to be displayed on the LED array by a user through a finger or a touch pen, detecting a pressure signal by a pressure sensor in the LED tuple when the finger or the touch pen passes through the LED tuple, and controlling the LED tuple to be lightened according to a set color by a controller so that the graph drawn by the user is displayed on the LED array.

And step three, after the drawing is finished, if the user needs to correct the image on the LED array, pressing a similar correction switch key, and then entering step four. Otherwise, the drawing display is ended.

And step four, generating a corrected image in the controller. The number of pixel points, the number of rows and the number of columns of the corrected image are all equal to those of the LED array. Each characteristic pixel point on the corrected image is black, and the rest pixel points are white; the characteristic pixel points are pixel points corresponding to each lighted LED tuple on the LED array. Thus, the pattern on the rectified image is the same as on the LED array.

And step five, thinning the corrected image, and reducing the dimensionality of the corrected image on the premise of keeping the same topological structure as the original image, so that the corrected image is changed into a pattern with one pixel width. The specific operation is as follows:

And step six, performing deburring treatment on the corrected image processed in the step five. The specific operation is as follows:

6-1, respectively calculating the target pixel sum of each black pixel point in the corrected image; the target pixel of one pixel point and the number of black pixel points in eight neighborhoods representing the pixel point are calculated.

6-2, traversing all black pixel points in the corrected image, and screening out forked pixel points; the forked pixel points are target pixels and black pixel points larger than 3.

6-3, setting all the branched pixel points in the corrected image to be white; thus, the originally connected regions become a plurality of small regions that are not connected.

And 6-4, respectively calculating the number of black pixel points of each connected domain in the corrected image, and setting the connected domains with the number of the black pixel points smaller than a threshold value T as white.

6-5, resetting the forked pixel points deleted in the step 6-3 to be black, so that the image is changed into a connected area, and thus obtaining a thinning effect image for removing burrs.

6-6, repeating the steps 6-1 to 6-5 until no pixel point is deleted in the step 6-4, and entering the step seven.

And step seven, performing expansion method operation on the corrected image.

7-1, setting structural elements. The structural element is composed of nine pixel points arranged in a 3 × 3 manner. The key point of the structural element is the center point.

The user can also select to draw the pattern or write the characters through cell-phone app, and the pattern and the text message that draw are passed through wireless communication means such as wifi and are transmitted lamp tablet microprocessing unit and handle and resolve the back and show, if the user uses similar correction function, the pattern or the text message that draw on the cell-phone app upload to high in the clouds (server end) through wireless communication means such as wifi and carry out similar correction, correct the result and return to the cell-phone again and issue LED lamp tablet by the cell-phone end and resolve and show.

Claims

1. An input display method of a hand-drawn LED lamp board based on a similar correction algorithm is characterized in that: the adopted hand-painted LED lamp board comprises a substrate and an LED array; the LED array is arranged on the substrate and comprises a plurality of LED tuples which are arranged in an array shape; the LED tuples comprise LED red lamps, LED green lamps, LED blue lamps and pressure sensors; the LED red lamp, the LED green lamp and the LED blue lamp are all arranged on the detection surface of the pressure sensor;

step one, starting a hand-painted LED lamp board;

secondly, drawing a graph to be displayed on the LED array by a user through a finger or a touch pen, wherein when the finger or the touch pen passes through the LED tuples, a pressure sensor in the LED tuples detects a pressure signal, and the LED tuples are lightened, so that the graph drawn by the user is displayed on the LED array;

step three, after the drawing is finished, if the image on the LED array needs to be corrected, the step four is carried out; otherwise, the drawing display is finished;

step four, generating a corrected image; the number of pixel points, the number of rows and the number of columns of the corrected image are all equal to those of the LED array; each characteristic pixel point on the corrected image is black, and the rest pixel points are white; the characteristic pixel points are pixel points corresponding to all the lighted LED tuples on the LED array;

step five, thinning the corrected image;

5-1, traversing each black pixel point in the corrected image; if four or more than four black pixel points exist in the eight neighborhoods of one pixel point, setting the pixel point to be white; when one pixel point is set to be white, extracting eight neighborhoods of the next pixel point according to the corrected image after modification;

5-2, continuously and repeatedly executing the step 5-1 until any pixel point is not set to be white after the step 5-2 is executed once, and entering the step six;

sixthly, performing deburring treatment on the corrected image processed in the fifth step;

6-1, traversing all black pixel points in the corrected image, and screening out forked pixel points; the branched pixel points are black pixel points with the number of black pixel points in eight neighborhoods larger than 3;

6-2, setting all the branched pixel points in the corrected image to be white; therefore, originally connected regions can become a plurality of small disconnected regions;

6-3, respectively calculating the number of black pixel points of each connected domain in the corrected image, and setting the connected domains with the number of the black pixel points smaller than a threshold value T as white;

6-4, resetting the forked pixel points deleted in the step 6-2 to be black;

6-5, repeatedly executing the steps 6-1 to 6-4 until any pixel point is not deleted in the step 6-3, and entering a step seven;

seventhly, performing expansion method operation on the corrected image;

7-1, setting structural elements;

7-2, performing expansion detection on all pixel points except edge pixel points on the corrected image by using the structural elements; the edge pixel points refer to pixel points on the edge of the corrected image;

when a pixel point is subjected to expansion detection by using a structural element, firstly, the key point of the structural element is superposed with the detected pixel point; if the pixels covered by the black pixels of the structural elements on the corrected image have the original black pixels, marking the detected pixels as pixels to be expanded;

7-3, setting all the pixel points to be expanded detected in the step 7-2 to be black; at the moment, the corrected image is corrected;

2. The input display method of the hand-drawn LED lamp board based on the similarity correction algorithm as claimed in claim 1, wherein: the structural element in the seventh step consists of nine pixel points which are arranged in a 3 multiplied by 3 manner; the key point of the structural element is the center point.

3. The input display method of the hand-drawn LED lamp board based on the similarity correction algorithm as claimed in claim 1, wherein: the hand-painted LED lamp board further comprises an on/off key, a writing/locking key, a clearing/recovering key, a color switching key, a similar correction on/off key and a color lamp group; an on/off key, a write-in/locking key, a clear/recovery key, a color switching key, a similar correction on/off key and an indicator lamp set are arranged on the substrate; the indicating lamp group consists of a power supply indicating lamp and seven color indicating lamp beads; the colors of the seven color indicating lamp beads are blue, green, cyan, red, purple, yellow and white respectively.

4. The input display method of the hand-drawn LED lamp board based on the similarity correction algorithm as claimed in claim 1, wherein: the hand-painted LED lamp board further comprises a wireless communication module and a controller; the controller is connected with the upper computer through a wireless communication module; the control interfaces of the LED red light, the LED green light and the LED blue light and the signal output interface of the pressure sensor are all connected with the controller; the on/off key, the write-in/locking key, the clear/recovery key, the color switching key, the similar correction on/off key and the indicating lamp set are sequentially arranged on one side of the substrate and are connected with the controller.

5. The input display method of the hand-drawn LED lamp board based on the similarity correction algorithm as claimed in claim 1, wherein: in one LED tuple, the LED red lamps, the LED green lamps and the LED blue lamps are arranged in a regular triangle.